electrical problems with 1995 white gm volvo intregal sleeper

The belts are the serpentine type multiple grooves and there's no cracks or too much wear. Tightened the short belt that runs aircon and alternator and is charging ok. Constant starting every 30 seconds is draining power from batteries plus charger is going to be left on for awhile until I can get them fully charged. I'm thinking it probably won't make any difference but see what happens later.

 

Hi it has a push button diagnostic and only one code shows, it is 27 and it showed before when fluid light was off or on.

This has not been anything easy to fix, older truck older wiring hours and hours in two repair shops??? The independent shop got closer to a possible fix than the Volvo dealer last year. If I can get it to run I'm taking it back in so this is where I'm at right now....

 

Oh yeah I'm not betting the farm on the swap myself but I can only go by what the Volvo shop foreman told me.

 

The swap out ecm was only tried out then original was put back in. The wiring was checked out from batteries through truck wherever they they go to. Cables were replaced that had wear. Truck has been used very little since then but I can check it out again myself. Yes better to get it back to a shop because it's handier of course for the shop mechanics to test but I'm stuck here for now so just want to wait and see if I can get the voltage back up on the batteries first. I don't have a tester to check ECM it's old type, round connector under dash. 6 pin I think. It's possible the swap ECM was faulty but they are not going to put a new one in unless I pay the $2000 plus for it. I have spent well over 6000 dollars just on this problem already not to mention the 500 dollars plus for new batteries last year. There has to be a solution somehow. Surely someone out there even if they are retired now should have had some experience with this problem.

 

I'm not trying to be a jerk about this to anyone that has been trying to help me. This has just been very exasperating and costly. It's very hard to make this truck pay when it's broke down all the time. Using it just for a short period of time during harvest is when it's needed most. Hauls are very short so buying a new truck was not within my budget at te time.